Dyson sphere
Hypothetical megastructure around a star
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![Dyson sphere: Hypothetical megastructure around a star](https://www.newsr.in/en/knowledge/Dyson-sphere_20190919.jpg)
A Dyson sphere is a hypothetical megastructure that encompasses a star and captures a large percentage of its solar power output. The concept is a thought experiment that attempts to imagine how a spacefaring civilization would meet its energy requirements once those requirements exceed what can be generated from the home planet's resources alone. Because only a tiny fraction of a star's energy emissions reaches the surface of any orbiting planet, building structures encircling a star would enable a civilization to harvest far more energy.
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